Ключевые слова: background, black, bright, bulb, chalk, chalkboard, concept, conceptual, creative, creativity, dark, design, electric, electricity, energy, environmental, equipment, glass, glow, glowing, idea, illuminated, illumination, imagination, incandescent, innovation, inspiration, intelligence, invention, lamp, light, lightbulb, object, power, save, science, solution, symbol, technology, transparent, tungsten, warming,